From c2908e60c9b021fb4bb69acff8d49981dd4dade8 Mon Sep 17 00:00:00 2001
From: Jason Sams <rjsams@android.com>
Date: Tue, 23 Feb 2010 17:44:28 -0800
Subject: Support defered generation of mipmaps.  With this change we support
 mipmap generation when the texture is uploaded to GL without requiring RS to
 retain the full chain.

---
 libs/rs/rs.spec           |  1 +
 libs/rs/rsAllocation.cpp  | 12 +++++++++---
 libs/rs/rsAllocation.h    |  3 ++-
 libs/rs/rsScriptC_Lib.cpp |  2 +-
 4 files changed, 13 insertions(+), 5 deletions(-)

(limited to 'libs/rs')

diff --git a/libs/rs/rs.spec b/libs/rs/rs.spec
index 10e5285..89d9d5e 100644
--- a/libs/rs/rs.spec
+++ b/libs/rs/rs.spec
@@ -113,6 +113,7 @@ AllocationCreateFromBitmapBoxed {
 
 AllocationUploadToTexture {
 	param RsAllocation alloc
+	param bool genMipMaps
 	param uint32_t baseMipLevel
 	}
 
diff --git a/libs/rs/rsAllocation.cpp b/libs/rs/rsAllocation.cpp
index 1ae2317..f1798de 100644
--- a/libs/rs/rsAllocation.cpp
+++ b/libs/rs/rsAllocation.cpp
@@ -17,6 +17,7 @@
 #include "rsContext.h"
 
 #include <GLES/gl.h>
+#include <GLES2/gl2.h>
 #include <GLES/glext.h>
 
 using namespace android;
@@ -88,12 +89,13 @@ bool Allocation::fixAllocation()
     return false;
 }
 
-void Allocation::deferedUploadToTexture(const Context *rsc, uint32_t lodOffset)
+void Allocation::deferedUploadToTexture(const Context *rsc, bool genMipmap, uint32_t lodOffset)
 {
     rsAssert(lodOffset < mType->getLODCount());
     mIsTexture = true;
     mTextureLOD = lodOffset;
     mUploadDefered = true;
+    mTextureGenMipmap = !mType->getDimLOD() && genMipmap;
 }
 
 void Allocation::uploadToTexture(const Context *rsc)
@@ -138,6 +140,10 @@ void Allocation::uploadToTexture(const Context *rsc)
                      adapt.getDimX(), adapt.getDimY(),
                      0, format, type, ptr);
     }
+    if (mTextureGenMipmap) {
+        glGenerateMipmap(GL_TEXTURE_2D);
+    }
+
 }
 
 void Allocation::deferedUploadToBufferObject(const Context *rsc)
@@ -316,10 +322,10 @@ RsAllocation rsi_AllocationCreateSized(Context *rsc, RsElement e, size_t count)
     return rsi_AllocationCreateTyped(rsc, type);
 }
 
-void rsi_AllocationUploadToTexture(Context *rsc, RsAllocation va, uint32_t baseMipLevel)
+void rsi_AllocationUploadToTexture(Context *rsc, RsAllocation va, bool genmip, uint32_t baseMipLevel)
 {
     Allocation *alloc = static_cast<Allocation *>(va);
-    alloc->deferedUploadToTexture(rsc, baseMipLevel);
+    alloc->deferedUploadToTexture(rsc, genmip, baseMipLevel);
 }
 
 void rsi_AllocationUploadToBufferObject(Context *rsc, RsAllocation va)
diff --git a/libs/rs/rsAllocation.h b/libs/rs/rsAllocation.h
index f0b2122..778c904 100644
--- a/libs/rs/rsAllocation.h
+++ b/libs/rs/rsAllocation.h
@@ -46,7 +46,7 @@ public:
     void * getPtr() const {return mPtr;}
     const Type * getType() const {return mType.get();}
 
-    void deferedUploadToTexture(const Context *rsc, uint32_t lodOffset);
+    void deferedUploadToTexture(const Context *rsc, bool genMipmap, uint32_t lodOffset);
     void uploadToTexture(const Context *rsc);
     uint32_t getTextureID() const {return mTextureID;}
 
@@ -98,6 +98,7 @@ protected:
     // Is this a legal structure to be used as a texture source.
     // Initially this will require 1D or 2D and color data
     bool mIsTexture;
+    bool mTextureGenMipmap;
     uint32_t mTextureLOD;
     uint32_t mTextureID;
 
diff --git a/libs/rs/rsScriptC_Lib.cpp b/libs/rs/rsScriptC_Lib.cpp
index 6b8ed0d..235c153 100644
--- a/libs/rs/rsScriptC_Lib.cpp
+++ b/libs/rs/rsScriptC_Lib.cpp
@@ -975,7 +975,7 @@ static void SC_hsb(float h, float s, float b, float a)
 static void SC_uploadToTexture(RsAllocation va, uint32_t baseMipLevel)
 {
     GET_TLS();
-    rsi_AllocationUploadToTexture(rsc, va, baseMipLevel);
+    rsi_AllocationUploadToTexture(rsc, va, false, baseMipLevel);
 }
 
 static void SC_uploadToBufferObject(RsAllocation va)
-- 
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